| Definition: | the difference between two colour stimuli, defined as the Euclidean distance between the points representing them in the L* u* v* space and calculated as equation (3) :
(3) ΔE*uv = [(ΔL*)2 + (Δu*)2 + (Δv*)2]½
NOTE – The CIE 1976 u, v hue-difference may be calculated as follows :
CIE 1976 u, v hue-difference
ΔH*uv = [(ΔE*uv)2 — (ΔL*)2 — (ΔC*uv)2]½
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